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Finding the Fourth Proportional to 18,612.20, 27,910.20 and 6,127.40

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Solution

The fourth proportional to 18,612.20, 27,910.20 and 6,127.40 is: 9,188.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.20 : 27,910.20 = 6,127.40 : x
  2. Step 2: Convert to fraction form
    18,612.20/27,910.20 = 6,127.40/x
  3. Step 3: Cross multiply
    18,612.20x = 27,910.20 × 6,127.40
  4. Step 4: Simplify right side
    18,612.20x = 171,016,959.48
  5. Step 5: Solve for x
    x = 171,016,959.48/18,612.20
  6. Step 6: Final answer
    x = 9,188.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.